Part of me though hopes they add more to it. I will be fine with just a campaign, but I never did get why they never had like a map editor/skirmish like mode. (I know one of them had like an arena local multiplayer but meh)

Fire Emblem games are, for the most part, disconnected, so no Roy. Marth is in this game however. Kind of. You'll see.

That said, there are DLCs that feature previous protagonists, such as Roy, Ephraim, Ike, Lin, etc. I'm not entirely sure if they can later be used in the main game, but they're available to some extent.

OH AND THIS GAME HAS A WORLD MAP WHICH IS AWESOME.

Edit: Oh and if you want to try Fire Emblem out, Sacred Stones is your best bet (arguably).

Fire Emblem games are, for the most part, disconnected, so no Roy. Marth is in this game however. Kind of. You'll see.

That said, there are DLCs that feature previous protagonists, such as Roy, Ephraim, Ike, Lin, etc. I'm not entirely sure if they can later be used in the main game, but they're available to some extent.

OH AND THIS GAME HAS A WORLD MAP WHICH IS AWESOME.

Edit: Oh and if you want to try Fire Emblem out, Sacred Stones is your best bet (arguably).

I might actually do the casual mode since, as much as I like Fire Emblem, I can't stand it when units die. I always reset the game until I can get through with all of my units intact, so I never really make a lot of progress in any of them since it's so tedious for me.